[LU-5647] Kernel update [RHEL7 3.10.0-123.8.1.el7]

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.7.0
• Environment: el7
• Severity: 3
• Assignee: Bob Glossman (Inactive)
• Reporter: Bob Glossman (Inactive)

Description

• An out-of-bounds memory access flaw was found in the Linux kernel's
  system call auditing implementation. On a system with existing audit rules
  defined, a local, unprivileged user could use this flaw to leak kernel
  memory to user space or, potentially, crash the system. (CVE-2014-3917,
  Moderate)

This update also fixes the following bugs:

• A bug in the mtip32xx driver could prevent the Micron P420m PCIe SSD
  devices with unaligned I/O access from completing the submitted I/O
  requests. This resulted in a livelock situation and rendered the Micron
  P420m PCIe SSD devices unusable. To fix this problem, mtip32xx now checks
  whether an I/O access is unaligned and if so, it uses the correct
  semaphore. (BZ#1125776)

• A series of patches has been backported to improve the functionality of
  a touch pad on the latest Lenovo laptops in Red Hat Enterprise Linux 7.
  (BZ#1122559)

• Due to a bug in the bnx2x driver, a network adapter could be unable to
  recover from EEH error injection. The network adapter had to be taken
  offline and rebooted in order to function properly again. With this update,
  the bnx2x driver has been corrected and network adapters now recover from
  EEH errors as expected. (BZ#1107722)

• Previously, if an hrtimer interrupt was delayed, all future pending
  hrtimer events that were queued on the same processor were also delayed
  until the initial hrtimer event was handled. This could cause all hrtimer
  processing to stop for a significant period of time. To prevent this
  problem, the kernel has been modified to handle all expired hrtimer events
  when handling the initially delayed hrtimer event. (BZ#1113175)

• A previous change to the nouveau driver introduced a bit shift error,
  which resulted in a wrong display resolution being set with some models
  of NVIDIA controllers. With this update, the erroneous code has been
  corrected, and the affected NVIDIA controllers can now set the correct
  display resolution. (BZ#1114869)

• Due to a NULL pointer dereference bug in the be2net driver, the system
  could experience a kernel oops and reboot when disabling a network adapter
  after a permanent failure. This problem has been fixed by introducing a
  flag to keep track of the setup state. The failing adapter can now be
  disabled successfully without a kernel crash. (BZ#1122558)

• Previously, the Huge Translation Lookaside Buffer (HugeTLB) allowed
  access to huge pages access by default. However, huge pages may be
  unsupported in some environments, such as a KVM guest on a PowerPC
  architecture, and an attempt to access a huge page in memory would result
  in a kernel oops. This update ensures that HugeTLB denies access to huge
  pages if the huge pages are not supported on the system. (BZ#1122115)

• If an NVMe device becomes ready but fails to create I/O queues, the nvme
  driver creates a character device handle to manage such a device.
  Previously, a character device could be created before a device reference
  counter was initialized, which resulted in a kernel oops. This problem has
  been fixed by calling the relevant initialization function earlier in the
  code. (BZ#1119720)

• On some firmware versions of the BladeEngine 3 (BE3) controller,
  interrupts remain disabled after a hardware reset. This was a problem for
  all Emulex-based network adapters using such a BE3 controller because
  these adapters would fail to recover from an EEH error if it occurred. To
  resolve this problem, the be2net driver has been modified to enable the
  interrupts in the eeh_resume handler explicitly. (BZ#1121712)

Bugs fixed (https://bugzilla.redhat.com/):

1102571 - CVE-2014-3917 kernel: DoS with syscall auditing